7693
2020
eng
058002
124
article
0
2020-02-04
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Collective directional locking of colloidal monolayers on a periodic substrate
We investigate the directional locking effects that arise when a monolayer of paramagnetic colloidal particles is driven across a triangular lattice of magnetic bubbles. We use an external rotating magnetic field to generate a two-dimensional traveling wave ratchet forcing the transport of particles along a direction that intersects two crystallographic axes of the lattice. We find that, while single particles show no preferred direction, collective effects induce transversal current and directional locking at high density via a spontaneous symmetry breaking. The colloidal current may be polarized via an additional bias field that makes one transport direction energetically preferred.
Phys. Rev. Lett.
10.1103/PhysRevLett.124.058002
yes
Phys. Rev. Lett.
Ralph L. Stoop
Arthur Straube
Arthur Straube
Tom H. Johansen
Pietro Tierno
Numerical Mathematics
Distributed Algorithms and Supercomputing
no-project
Straube, Arthur
Modeling and Simulation of Complex Processes